"To be honest, Grease has had a slating for a reason and X Factor is just a much better produced show. I can't wait to be part of it."

Brian also revealed that he is already friends with Cowell - and even reckons he can take credit for ending Simon's high-waisted trouser obsession.

He declared: "I am the man responsible for getting rid of his high-waisted trousers, they were awful. He is much trendier now - thanks to me."

Brian added: "I met Victoria Beckham the other day and she asked if I would take her shopping because she loves my style so much."

Brian also already knows Sharon Osbourne so working on X Factor will be like being with old friends. He said: "I love Sharon, she is so funny and I know her very well. Dannii is really cute too - I'm sure we will have lots of fun."